a-a a-c a-t aaa aac aao aap aat aav ac- aca acc aco acp act acv aoa aoc aoo aop aot aov ap- apa apc apo app apt apv at- ata atc ato atp att atv av- ava avc avo avp avt c-- caa cac cao cap cat cav cca ccc cco ccp cct ccv co- coa coc coo cop cot cov cpa cpc cpo cpp cpt cpv cta ctc cto ctp ctt ctv cva cvc cvo cvp cvt cvv oaa oac oao oap oat oav oc- oca occ oco ocp oct ocv oo- ooa ooc ooo oop oot oov op- opa opc opo opp opt opv ot- ota otc oto otp ott otv ov- ova ovc ovo ovp ovv p-p paa pac pao pap pat pav pca pcc pco pcp pct pcv poa poc poo pop pot pov ppa ppc ppo ppp ppt ppv pt- pta ptc pto ptp ptt ptv pva pvc pvo pvp pvt pvv taa tac tao tap tat tav tca tcc tco tcp tct tcv to- toa toc too top tot tov tpa tpc tpo tpp tpt tpv tta ttc tto ttp ttt ttv tva tvc tvo tvp tvt v-a vaa vac vao vap vat vav vca vcc vco vcp vct voa voc voo vop vot vov vpa vpc vpo vpp vpt vta vtc vto vtt vtv vva vvc vvo vvt vvv